Material handling machine



MATERIAL HANDLING MACHINE Filed Jan. 8, 1943 4 2 Sheets-Sheet l IN VENTOR.

A T TORNE Y5.

Patented Oct. 26, 1943 UNITED-STATES PATENTV A IAL HANDLING MACHINEWilliam H. Bosworth, Yonkers, N. Y., assignor to 3 George HaissManufacturing Co. Inc., New York, N. Y a corporation of New YorkApplication. January 8, 1943, Serial No. 471,690

4 Claims. (01.198-9) This invention relates to material handlingmachines sometimes called wagon loaders although they may be used notonly for the loading of wagons and trucks with sand, gravel or othermaterials, but also for picking up such materials and feeding them to amixing machine.

The inventionis particularly useful in connection with material handlingmachines of the type employing a pivotally supported bucket elevator towhich the material to be handled is fed bya scraper and rotary diggingand feeding elements which operate upon the material to be handled asthe lower end of the bucket elevator is crowdedat slow speed into suchmaterial. Such machines are shown; for example. in United StatesPatents, No. 1,674,329 to Haiss, in which the scraper is attached bothto the bucket elevator and to themainframe of the machine; and No.1,958,460 to Barber, in which the scraper is supported entirelyirom themain frame of the machine.

'The present-invention"particularly relates to construction andarrangement makes the scraper independent of the mainframe-of themachine and insures that, when the pivoted frame of the bucket elevatoris tilted, the scraper will move with that frame and will maintainsubstantially thesameposition with reference to the buckets parts arereferred to throughout the drawings by the samereference characters. g

In Fig. 1, the bucket elevator is shown as including buckets 5 in whichthe materialis picked up and carried upward, mounted on two sprocketchains one. of which is shown at 6, running on sprocket wheels one ofwhich is shown at 1, carried by ashaft 8 mounted in bearings one ofwhich is shown at I0, supported on the elevator side frames one of whichis shown at l2. The shaft 8 carries the usual digging and feedingelements l3, which serve to feed the material to be handled fromeachside toward the path of the buckets 5. It will beunderstoodthatthebucket elevator frame is pivotally mounted on the main frame of themachine,'and that themain frame of the machine is supported on atraction-mechanism of the endless-track or any other suitable typegenerally indicated at i5. All of the parts so far described aresimilarto those shown in the hereinbefore mentioned Patent No.1,674,329.

Cooperating with the buckets 5 and the dig- ,ging'and feeding elementsl3, i'sga scraper which will nowbe described together with the means bywhich it is adjustablysupporte'd entirely from the elevator frame; Aswill hereafter appear, the

scraper is not connected to the main frame of the machine, but is heldin proper relation to the buckets 5 and the digging and feeding elementsI3 by means connected to the bucket elevator frame and to the rigidback-frame of 'thes'craper. The construction of the scraper will bereadily understood from Figs. 2' and 3. The rigid backfr'ame'of thescraper has a center scraper plate and to the digging and feedingelements at all times regardless of the position to whichthe bucketelevator may be tilted. Thus, pivotal movement of the bucket elevator isfacilitated,

and the bucket elevator remains substantially balanced on its pivot inall positions.

The invention will be understood from the following description of anembodiment thereof as shown in the accompanying drawings inwhich Fig. 1isa fragmentary side elevation, partly in section, showing the pick-upend of a material handling machine having the invention embodiedtherein; Fig. 2 is a perspective view of por-- tions of the scraper andthe associated parts by which it is supported; and Fig. 3 isa rear viewoftherigidbackframe of the scraper; The same H; to each side of whichare attached protection" plates l8 and I9. It will be understood thatthis center scraper plate I! is substantially parallel to the sideframes H of the bucket elevator, and

that the center platejl'l serves', along with the:

protection plates l8 and t9, toretain in the path of the buckets 5 thematerial which is fed to the bucket elevator by the rotary digging andfeeding elements I31 The bottom of the center scraper plate I I isprovided with a scraper blade 1 suitably attached to the plate i'l bybolts 22.

A'shoe ofbent platemetal, of the form shown at 24 in Fig; 1, is attachedto the center scraper blade 2 I, and is adapted to slide upon the groundwhen the machine is in operation. It will be noted fromflFig'. 3 thatthe center scraper-plate His made rigid by across brace consisting of anangle iron 2T welded in a diagonal; position behind and beneath thescraper plate ll. [Secured to and extending outwardly; from each of theprotectionplates I 8 and 19, are side frames 30 OFFICE 1 distortion thevery considerable strains to which it is subjected during the use of themachine. The structureof the side-frame 3i (and of the similarside-frame will be, understood from Figs. 2 and 3 from which it isapparent that each side-frame includes a rectangular framemade up of topand bottom sections134 and and side sections 36 and 37, to which arewelded corner plates 39, 30, 4! and 42. Cross braces and 45 whichrespectively arewelded at their ends to the plates 39 and 4| and. to theplates lfi and it andcentrally to the plate 43 serve to maintain therectangular shapeof the frames 36! and Bi. As will be apparent fromFigs. 2 and 3, the sideframes 30 and 3 l aresuitably braced by thebracing members 43, 49 andfifl extending at an angle to the planes ofthe side frames (wand 3|, from near the outer portion of the latter tothe rear edge of the protection plate l8 or 9; that is, the bracingmember-Wis secured atone end to the corner plate 39 and at the other endto the plate 52 secured to the protectionplate i8 or it, the bracingmember is is secured at one end to the corner plate and at-the other endto a plate filsecured to the protection plate l8 or it, and the bracingrnember bil is secured at one end to the corner plate 42 and at theother end'to a plate 53 secured to the protection plate H8 or 19. Thustheside-frames 3t and 3!; are rigidly secured respectively to the.protection plates l8 and I3 which are attached-to the centerscraperplate [Land the side frames .Siland 3! lie in the sameso as to, permitthe usual limited pivotalinovement on the bolt, 64,. thereby making itpossible for the scraper to pick up; material from a crowned roadsurface. g e l I The means by which the entire scraper structure issupported from the frame of the bucket elevator willnowbe described.This supporting means is clearlyshown in Figs. land 2 from which it willbe apparent that thevarious elements of the supporting means are in twogroups and that each group islocated on each side of the center scraperplate llj'in planes parallel, to and adjacent theprotector plates Hi andI9. One pair of elements of the supporting means consists ofspacingmeansor links lil and l"! the forward ends of: whichare pivotallyconnected to the elevator side-frames l2; as shown at 'it in Fig. l, andat their rearward ends are pivotally connected to the protector. plates58 and I9 and the rigid; back frame of'the scraper as indicated at M inFig.1. Another pair of elemeans are the links 16 and 11 containing turnbuckles 18 and 79; the rear ends of which are pivotally connected at 851to plates 81 secured to the frame of the bucket elevator, and theforward ends of which are pivotally connected at 83 to the protectorplates l8 or 59 near their tops. Thus the rigid back frame of thescraper is secured at its top and near its bottom to the conveyor framel2 by the links ill-H and Hi-11, in such a manner that the scraperplates 33 lie in substantially vertical planes, and slight verticalmovement of the whole scraper is permitted.

Another pair of elements cooperating with the scraper are the bolts 85and 8B which at one end are pivotally connected at 83 to the protectionplates l8 and I9 and at their other end pass freely through holes inbrackets 88 secured to the side frames of the bucket elevator, the upperends of the bolts 85 and 88 being threaded and provided with nuts 90permitting adjustment of the effective length of the bolts 85 and 88.Sleeves 92 secured to the brackets 88 surround the threaded ends of thebolts 85 and 85 and protect the threads. It is apparent that byadjusting the nuts 90 the height of the scraper may be controlled; andit will be understood that in practice the nuts 9!] are so setthat thescraper shoe 24 will just touch the ground. It will also be understoodthat the sliding fit between the bolts 85 and 86 and the brackets 88permits the scraper to rise when it passes over a hump in the groundover which the machine is moved.

From the foregoing description it will be apparent that the rigid backframe of the scraper may be tiltedforwardly and backwardly by turningthe turn-buckles I3 and 79, and may be ad justed asto height and as toslope transversely of themachine by adjusting the nuts 953 on the bolts85 and 85. It will also be apparent that the scraper is supported in itsproper position entirely from the pivoted frame of the bucket elevator,and that when the frame of the bucket elevator is tilted to itsinoperative position (when the material handling machine is being movedfrom one location to another) the entire scraper structure separatefrombut cooperating with. said bucket elevator and with said digging andfeeding elements and comprising a rigid back-frame, a centerscraperplate rigidly secured thereto, and side scraper plates mounted onsaid back frame one at each side of said'center plate; and means locatedadjacent the edges of said center scraper plate for adjustably'supporting said rigid backframe entirely from said elevator frame. 2. Ina material handling machine, in combination with a bucket elevatorincluding a frame, and rotary digging and feeding elements cooperatingwith said bucket elevator; a scraper separate from but cooperating withsaid bucket elevator and with said digging and feeding elements andcomprising a rigid back-frame, a center scraper plate rigidly securedthereto, and a side scraper plate mounted on said.:back frame at eachside of said center plateyandmeans located adjacent the edges of said:center scraper plate ments forming part of the scraper-supporting 75 foradjustably supporting saidrigid back-frame entirely from said elevatorframe comprising spacing means connecting the bottom and the top of saidback-frame to said elevator frame, and adjustable supporting meansconnecting the top of said back-frame to said elevator frame.

3. In a material handling machine, in combination with a bucket elevatorincluding a frame, and rotary digging and feeding elements cooperatingwith said bucket elevator; a scraper cooperating with said bucketelevator and with said digging and feeding elements and comprising arigid back-frame, a center scraper plate rigidly secured thereto, and aside scraper plate mounted on said back frame ateach side of said centerplate; and means for supporting said rigid backframe entirely from saidelevator frame comprising spacing means pivotally connected to saidelevator frame at points ahead of said scraper and to said back-framenear its bottom, spacing means pivotally connected to said elevatorframe at points behind said scraper and to said backframe near its top,and supporting means slidably connected to said elevator frame andpivotally connected to said back-frame.

4. In a material handling machine, in combination with a bucket elevatorincluding a frame,

and rotary digging and feeding elements cooperating with said bucketelevator; a scraper cooperating with said bucket elevator and with saiddigging and feeding elements and comprising a rigid back-frame, a centerscraper plate rigidly secured thereto, and a side scraper plate mountedon said back-frame at each side of said center plate; and means forsupporting said rigid backframe entirely from said elevator framecomprising links pivotally connected to said elevator frame near its endat points ahead of said scraper and to said back-frame near its bottom,links pivotally connected to said elevator frame at points behind saidscraper and to said backframe near its top, and bolts slidably connectedto said elevator frame at points above said scraper and pivotallyconnected to said backframe near its top.

WILLIAM H. BOSWORTH.

